Hiroto Motoyama
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Explore the profile of Hiroto Motoyama including associated specialties, affiliations and a list of published articles.
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9
Citations
5
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Recent Articles
1.
Mikami K, Ishino M, Motoyama H, Dinh T, Yokomae S, Yamaguchi G, et al.
Opt Lett
. 2023 Sep;
48(19):5041-5044.
PMID: 37773380
Damage thresholds and structures on a metal aluminum and an aluminum oxide crystal induced by the soft x-ray free electron laser irradiations were evaluated. Distinctive differences in damage thresholds and...
2.
Egawa S, Matsuzawa Y, Hiraguri K, Motoyama H, Yamaguchi G, Yokomae S, et al.
Rev Sci Instrum
. 2023 May;
94(5).
PMID: 37195135
In this study, figure correction of a master mandrel of a Wolter mirror by organic abrasive machining (OAM) was demonstrated. In OAM, a flow of slurry, dispersed with organic particles,...
3.
Yamaguchi G, Motoyama H, Owada S, Kubota Y, Egawa S, Kume T, et al.
Rev Sci Instrum
. 2022 Jan;
92(12):123106.
PMID: 34972441
We developed a copper electroforming replication (CER) process to fabricate precise ellipsoidal mirrors for soft x-ray focusing. Some applications of ellipsoidal mirrors in x-ray microscopy require that all components that...
4.
Sakaue K, Motoyama H, Hayashi R, Iwasaki A, Mimura H, Yamanouchi K, et al.
Opt Lett
. 2020 May;
45(10):2926-2929.
PMID: 32412508
We demonstrate sub-micrometer processing of two kinds of thin films, polymethyl methacrylate (PMMA) and metal nano-particle resist, by focusing high-order harmonics of near-IR femtosecond laser pulses in the extreme ultraviolet...
5.
Egawa S, Owada S, Motoyama H, Yamaguchi G, Matsuzawa Y, Kume T, et al.
Opt Express
. 2019 Dec;
27(23):33889-33897.
PMID: 31878448
We developed a full-field microscope with twin Wolter mirrors for soft X-ray free-electron lasers. The Wolter mirrors for a condenser and an objective were fabricated using an electroforming process with...
6.
Motoyama H, Owada S, Yamaguchi G, Kume T, Egawa S, Tono K, et al.
J Synchrotron Radiat
. 2019 Sep;
26(Pt 5):1406-1411.
PMID: 31490128
Intense sub-micrometre focusing of a soft X-ray free-electron laser (FEL) was achieved by using an ellipsoidal mirror with a high numerical aperture. A hybrid focusing system in combination with a...
7.
Takeo Y, Motoyama H, Senba Y, Kishimoto H, Ohashi H, Mimura H
J Synchrotron Radiat
. 2019 May;
26(Pt 3):756-761.
PMID: 31074440
Probing the spatial coherence of X-rays has become increasingly important when designing advanced optical systems for beamlines at synchrotron radiation sources and free-electron lasers. Double-slit experiments at various slit widths...
8.
Kume T, Takei Y, Egawa S, Motoyama H, Takeo Y, Yamaguchi G, et al.
Rev Sci Instrum
. 2019 Mar;
90(2):021718.
PMID: 30831680
An x-ray ellipsoidal mirror is an ideal tool for focusing soft x-rays. Because nanometer-level shape accuracy is required in the internal surface of a mirror having a small diameter, it...
9.
Mimura H, Takei Y, Kume T, Takeo Y, Motoyama H, Egawa S, et al.
Rev Sci Instrum
. 2018 Oct;
89(9):093104.
PMID: 30278763
In X-ray focusing, grazing incidence mirrors offer advantages of no chromatic aberration and high focusing efficiency. Although nanofocusing mirrors have been developed for the hard X-ray region, there is no...